Pictures of Celebrities at 2011 New York Fashion Week

New York Fashion Week rolled on over the weekend with plenty of parties, shows, and events. Jon Hamm kicked things off at the Rag & Bone presentation on Friday, and Kim Kardashian made an appearance with Sophia Bush at Charlotte Ronson on Saturday. Kim was then off to LA for the Grammys, but Sophia continued the front row fun with an appearance at Max Azria yesterday. Fergie and Molly Sims had prime seating to see the hot fringe boots at Diane von Furstenberg, and Kanye West hung out with music friends at Band of Outsiders. Zac Efron, meanwhile, looked dapper in his suit next to Joe Jonas at Calvin Klein's collection yesterday afternoon. That's not all that happened in NYC this weekend — click into the gallery to see all the photos! Also, make sure to check out FabSugar and Fashionologie for exclusive videos and all the hottest looks.